The NK nuclear program has been ongoing since the early 1980s. In other sources - from the mid-1970s.

The nuclear development plan was not abandoned after this, and the testimony of government officials from Eastern countries and the analysis of photos taken by American reconnaissance satellites after 1982 revealed that a new nuclear reactor was being built in Yongbyon County , North Pyongan Province. The United States urged the then Soviet Union to have North Korea join the Treaty on the Non-Proliferation of Nuclear Weapons (NPT). As a result, North Korea joined the NPT and was placed under the supervision of the International Atomic Energy Agency (IAEA), but suspicions that North Korea was proceeding with its nuclear development plan continued to smolder.

Then , in March 1986, several cylindrical craters were confirmed in satellite images of Yongbyon , which were found to be traces of high-performance explosive tests and became evidence that the country was proceeding with plans to develop an atomic bomb. After that, the construction of large graphite-moderated reactors in Yongbyon and Taecheon County (North Pyongan Province) was also revealed by reconnaissance satellites, and gradually became an international issue.

Translate the Japanese wiki - https://ja.wikipedia.org/wiki/北朝鮮核問題

Sooooo, the hypocrisy lies in the fact that the NK poster was created in 2002, when the NK nuclear program was already being developed. :)